starfox5454
15.02.2021 •
Chemistry
What is chemical formula for cos?
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Ответ:
Cobalt sulfide
(didn't get the question properlystill tried to help from how far i understood Hope it helps!) :)
Ответ:
λ = 1.43 x 10³ meters (radio waves)
Explanation:
c = f·λ => λ = c/f
λ = wavelength = ?
f = frequency = 2.10 x 10¹⁴ Hz = 2.10 x 10¹⁴ cycles/sec
c = speed of light (vacuum) = 3.0 x 10⁸m/sec
λ = c/f = 3.0 x 10⁸m/sec / 2.10 x 10¹⁴sec⁻¹ = 1.43 x 10³ meters (radio waves)